If the Senate is evenly split between Dems and Reps, who is the majority leader?

The VP casts the deciding vote. The majority leader is the VP/President's party. It won't happen in this election.

There is nothing about "shared leadership" in the US constitution. There used to be a provision in Senate bylaws where they split the committee chairmanships, but when Trent Lott kept that tradition, the Republicans removed him and stuck in our guy from Tennessee (Frist), so there is no tradition left of doing that either.

Source: Like silly people, I have read the US Constitution.

Yes, this has already happened in 2000. The republicans held a 51/49 lead until Jim Jeffords became an Independent in 2001 and caucused with the democrats making it 50/50. The democrats demanded and received "shared leadership" of the Senated.

ADDITION:

Wow, a thumbs down for answering with what actually happened in 2001. Look it up for yourself.

http://en.wikipedia.org/wiki/United_States_Senate_...

I think Democrats had 51 until Joe Lieberman defected. They had the majority legitimately with him, they then had 50, meaning republicans had not legitimately gained majority. So Harry Reid got to keep his job.

Lieberman has threatened to register and run as a Republican if democrats should ever show open hostitility toward the war effort in Iraq.

Yes. It is called shared leadership. The ranking members of most committees head those committees and the VP is called upon more often to settle disputes. Usually one member of one of the parties or an independent caucuses with one side or the other to create a 51 49 split.

Actually its 49, 49 and 2 independents.

Well they say the VP gets to vote, but realistically, is the VP goin got pick the opposing party?

Not likely.

So you might as well say it goes to the VP's party.

The VP gets a vote.